Psilocybin-Research.comSearchable psilocybin and psilocin bibliometric database.Countries and organisations
Explore psilocybin trials by country, sponsor and research facility. Compare registry status, study-start trends, conditions and mapped research sites.
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Explore registry geography and organisations
4 trials match this view; 39 mapped facilities. Latest indexed registry check Oct 9, 2026 01:24 UTC. Country membership uses reported locations, including locations without coordinates; Mapped-facility counts cover all sites of matching trials, including international sites, and require valid coordinates.
Enrollment sum: 699 across 4 records with a reported count. Planned and actual counts are mixed; this is not a count of unique treated participants.
Recorded study-start years
Current indexed registry status
Reported research conditions
Counts describe indexed registry records, not efficacy or total research activity. A trial can count under several conditions or countries. Unknown dates are excluded from the start-year chart; future years reflect planned starts. Stopped studies may reflect recruitment, funding or strategy and are not automatically treatment failures.
Countries with reported trial locations
Sponsors recorded in this index
Matching trial records
| Trial | Sponsor and phase | Status | Enrollment | Start / primary completion / completion | Research workflow |
|---|---|---|---|---|---|
| A Phase 3, Randomized, Double-Blind, Multicenter Study to Evaluate the Efficacy, Safety, and Tolerability of Psilocybin in Adults With Major Depressive Disorder (MDD)Depressive Disorder, Major | Usona Institute PHASE3 | Active, not recruiting Registry updated 2026-07-23 | 238 ACTUAL | 2024-03-13 2026-01-05 2027-01-30 | |
| A Randomized, Double-Blind Study of Single-Dose Psilocybin for Major Depressive Disorder (MDD)Depressive Disorder, Major | Usona Institute PHASE2 | Completed Registry updated 2026-04-22 | 347 ACTUAL | 2020-01-23 2022-06-28 2022-06-28 | |
| Psilocybin vs Escitalopram for Major Depressive Disorder: Comparative MechanismsDepressive Disorder, Major | Imperial College London PHASE2 | Completed Registry updated 2024-10-24 | 59 ACTUAL | 2019-01-07 2020-04-17 2020-10-17 | |
| Phase II, Randomized, Double Blind, Placebo Controlled, Parallel Group, Single Center Study of Psilocybin Efficacy in Major DepressionDepressive Disorder, Major | University of Zurich PHASE2 | Completed Registry updated 2022-04-29 | 55 ACTUAL | 2019-03-11 2021-10-12 2022-04-12 |
Reported research facilities
University of Alabama Clinical Research UnitBirmingham, Alabama, United States
Preferred Research Partners-NWA, LLCFayetteville, Arkansas, United States
Preferred Research Partners, Inc.Little Rock, Arkansas, United States
Kadima Neuropsychiatry InstituteLa Jolla, California, United States
West LA VA Medical Center - Mental Health DepartmentLos Angeles, California, United States
Pacific Neuroscience Institute (PNI) at Saint John's Physician PartnersSanta Monica, California, United States
Psychedelic Science InstituteSanta Monica, California, United States
Mountain View Clinical ResearchDenver, Colorado, United States
Connecticut Mental Health Center, Yale UniversityNew Haven, Connecticut, United States
Clinical Neuroscience Solutions Inc.Jacksonville, Florida, United States
Innovative Clinical Research, Inc.Lauderhill, Florida, United States
Clinical Neuroscience Solutions, Inc.Orlando, Florida, United States
Emory UniversityAtlanta, Georgia, United States
CenExel iResearch, LLCDecatur, Georgia, United States
Great Lakes Clinical TrialsChicago, Illinois, United States
Johns Hopkins School of Medicine, Center for Psychedelic and Consciousness ResearchBaltimore, Maryland, United States
Sunstone Medical PCRockville, Maryland, United States
Washington University School of MedicineSt Louis, Missouri, United States
VA Nebraska Western Iowa Health Care SystemOmaha, Nebraska, United States
Global Medical Institutes, LLC; Princeton Medical InstitutePrinceton, New Jersey, United States
University of New Mexico (UNM) Interdisciplinary Substance Use and Brain Injury (ISUBI) CenterAlbuquerque, New Mexico, United States
NYU Clinical & Translational Science InstituteNew York, New York, United States
Bronx Veterans Research Foundation at the James J. Peters VAMCThe Bronx, New York, United States
AIM Trials, LLCPlano, Texas, United States
Clinical Trials of Texas, LLCSan Antonio, Texas, United States
Cedar Clinical ResearchDraper, Utah, United States
Cedar Clinical Research, Inc.Murray, Utah, United States
Seattle Neuropsychiatric Treatment CenterBellevue, Washington, United States
VA Portland Health Care SystemVancouver, Washington, United States
University of California, San FranciscoSan Francisco, California, United States
Pacific Neuroscience InstituteSanta Monica, California, United States
Yale UniversityNew Haven, Connecticut, United States
Segal TrialsLauderhill, Florida, United States
Johns Hopkins UniversityBaltimore, Maryland, United States
Hassman Research InstituteBerlin, New Jersey, United States
New York University School of MedicineNew York, New York, United States
University of Wisconsin - MadisonMadison, Wisconsin, United States
Imperial College Hammersmith campusLondon, United Kingdom
Psychiatrische Universitätsklinik ZürichZurich, Switzerland
This list includes mapped sites of matching trials, including international sites; locations without usable coordinates are omitted. Facilities are registry-reported trial sites, not an independently verified clinic or research-centre directory. Current services and contact details must be checked at the source.